html,body,h1,h2,h3,h4,h5,h6,div,dl,dt,dd,ul,ol,li,p,blockquote,pre,hr,figure,table,caption,th,td,form,fieldset,legend,input,button,textarea,menu{margin:0;padding:0;}
header,footer,section,article,aside,nav,hgroup,address,figure,figcaption,menu,details{display:block;}
table{border-collapse:collapse;border-spacing:0;}
caption,th{text-align:left;font-weight:normal;}
html,body,fieldset,img,iframe,abbr{border:0;}
i,cite,em,var,address,dfn{font-style:normal;}
[hidefocus],summary{outline:0;}
li{list-style:none;}
h1,h2,h3,h4,h5,h6,small{font-size:100%;}
sup,sub{font-size:83%;}
pre,code,kbd,samp{font-family:inherit;}
q:before,q:after{content:none;}
textarea{overflow:auto;resize:none;}
label,summary{cursor:default;}
a,button{cursor:pointer;}
h1,h2,h3,h4,h5,h6,em,strong,b{font-weight:bold;}
del,ins,u,s,a,a:hover{text-decoration:none;}
body,textarea,input,button,select,keygen,legend{font:12px/1.14 arial,5b8b4f53;color:#333;outline:0;}
body{background:#fff;}
a,a:hover{color:#333;}
div{box-sizing: border-box}

.root{
  width: 100%;
  height: 100vh;
  display: flex;
}
.aside{
  background-color: #999;
  width: 200px;
  height: 100%;
}
main{
  height: 100%;
  flex-grow: 1;
  flex-shrink: 0;
}

.to-top{
  position: fixed;
  right: 40px;
  bottom: 40px;
  cursor: pointer;
  transform: scale(0);
  transition: transform .15s;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: yellow;
  font-size: 24px;
}
.to-top.active{
  transform: scale(1);
}

.loading{
  height: 32px;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  opacity: 0;
  transition: all .15s;
}

.loading.active{
  opacity: 1;
}

.header{
  height: 80px;
  background-color: #aaa;
}

.water-fall-container::-webkit-scrollbar{
  width: 8px;
  background-color: #eee;
}
.water-fall-container::-webkit-scrollbar-thumb{
  background-color: #bbb;
  border-radius: 4px;
}

.water-fall-container::-webkit-scrollbar-thumb:hover{
  background-color: #aaa;
}

.water-fall-container{
  padding: 20px;
  height: calc(100% - 80px);
  overflow-y: scroll;
  overflow-x: hidden;
}

.container{
  position: relative;
  width: 100%;
}

.waterfall-item{
  position: absolute;
  transition: all .12s;
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
}

.main{
  flex-grow: 1;
  flex-shrink: 0;
  background-color: pink;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}
.footer{
  box-sizing: border-box;
  padding: 12px;
  background-color: greenyellow;
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
}
.info{
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.text{
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 10px;
  letter-spacing: 0;
}